Improvement in sewing-machines



C. E. LANGMAID.

Sewing-Machine.

Patented Nov. 12, 1872.

\NlTm-zssss AM PHOTO-UTHOGRA) ."IG GUMYNSBGHNEIS PROCESS) UNITED STATES PATENT OFFICE.

CHARLES E. LANGMAID, OF STONEHAM, MASSACHUSETTS, ASSIGNOR OF ONE-HALF HIS RIGHT TO GEORGE A. LANGMAID, OF SAME PLACE.

IMPROVEMENT IN SEWING-MACHINES.

. Specification forming part of Letters Patent No. 132,968, dated November 12, 1872.

To all whom it may concern.-

Be it known that I, CHARLES E. LANGMAID, of Stoneham, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification:

The Nature of the IVWBTLIiOR.

Description of the Drawing. Figure 1 is an elevation, showing my invention. Fig. 2 is a plan of the same. Fig. 3 is a cross-section, showing details.

General Description.

Let A represent the table or plate of the machine, and B the arm in which the needledriving shaft D is hung. P is the needle-bar, and may be driven in any of the approved methods. The head-block 0, through which chine to stitch a sinuous line.

the needle-bar P works, is made movable, and is provided with a shank, G which, sliding in a groove in the .arm B, admits of the motion of the head-block, and yet holds it securely from any lateral motion. Figs. 2 and 3, is a start fixed in the shank O and the headblock 0, together with the needle-bar, will move back and forth, thus causing the ma- The cam is actuated by the link G, which works the plate II and pawl K. The link G is attached to a crank-pin in the wheel 'F, the wheel F being driven by the wheel E on the shaft D.

From the above it will be seen that the motion imparted to the head-block, giving a lateral motion to the needle, and thus causing it .to stitch in a sinuous line, is governed entirely by the cam M, and that by giving peculiar forms to the cam-groove a great variety of styles of stitches may be made.

I do not claim, broadly, the employment of a movable head-block but I claim as my invention- The combination of the wheels E F, link G, plate H, pawl K, ratchet-wheel N, cam M, with the movable head-block 0 having the shank O and start 0 as described.

CHARLES E. LANGMAID.

Witnesses:

- WILLIAM EDsoN,

FRANK G. PARKER. 

